--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cm/media/js/client/c_selection.js Mon Nov 23 15:14:29 2009 +0100
@@ -0,0 +1,199 @@
+getWrapperAncestor = function(elt) {
+ var parent = elt ;
+ while (parent != null) {
+ if (CY.DOM.hasClass(parent, 'c-s'))
+ return parent ;
+ parent = parent.parentNode ;
+ }
+ return null ;
+}
+
+hasWrapperAncestor = function(elt) {
+ return (getWrapperAncestor(elt) != null) ;
+/* var parent = elt ;
+ while (parent != null) {
+ if (CY.DOM.hasClass(parent, 'c-s'))
+ return true ;
+ parent = parent.parentNode ;
+ }
+ return false ;*/
+}
+
+// returns null or :
+// {'text' : textcontent, 'start': {'elt':startNode, 'nbChar':startOffset(==number of characters to selection start in the start node},
+// 'end': ....}
+// the text attribute is informational having it empty doesn't mean selection is empty !!
+
+// when selection starts/ends in/on a non textual element (<hr/> for example) we very often have anchorNode/focusNode == body elt
+// TODO adapt this body case by considering offset ( cf. http://www.w3.org/TR/DOM-Level-2-Traversal-Range/ranges.html)
+getSelectionInfo = function () {
+ var startNode = null, endNode = null, startOffset = 0, endOffset = 0, text = '' ;
+
+ if (window.getSelection) { // everything else than IE
+ var userSelection = window.getSelection();
+
+ if (userSelection.rangeCount > 0) {
+ var range = userSelection.getRangeAt(0) ;
+ text = range.toString() ;
+ if (text != "") {
+
+ // selection occured from right to left ? :
+ var r1 = document.createRange() ;r1.setStart(userSelection.anchorNode, userSelection.anchorOffset) ;r1.collapse(true) ;
+ var r2 = document.createRange() ;r2.setEnd(userSelection.focusNode, userSelection.focusOffset) ;r2.collapse(false) ;
+ var leftToRight = (r2.compareBoundaryPoints(2, r1) == 1) ; // 2 is for END_TO_END
+// CY.log("leftToRight : " + leftToRight) ;
+ startNode = (leftToRight) ? userSelection.anchorNode.parentNode : userSelection.focusNode.parentNode ;
+ innerStartNode = (leftToRight) ? userSelection.anchorNode : userSelection.focusNode ;
+ endNode = (leftToRight) ? userSelection.focusNode.parentNode : userSelection.anchorNode.parentNode;
+ innerEndNode = (leftToRight) ? userSelection.focusNode : userSelection.anchorNode;
+
+ startOffset = (leftToRight) ? userSelection.anchorOffset : userSelection.focusOffset;
+ endOffset = (leftToRight) ? userSelection.focusOffset : userSelection.anchorOffset ;
+
+ if (!hasWrapperAncestor(endNode) && hasWrapperAncestor(startNode)){
+ var r3 = document.createRange() ;
+ r3.setStart(innerStartNode, startOffset) ;
+
+ var csStartAncestor = getWrapperAncestor(startNode) ;
+ var next = csStartAncestor ;
+ r3.setEndAfter(next) ;
+
+ var ind = parseInt(csStartAncestor.id.substring('sv_'.length)) ;
+ while(r3.toString().length < range.toString().length) {
+ ind++ ;
+ var node = CY.get("#sv_"+ind) ;
+ if (node) {
+ next = CY.Node.getDOMNode(node) ;
+ r3.setEndAfter(next) ;
+ }
+ else
+ break ;
+ }
+ endNode = next.lastChild ;
+ endOffset = CY.DOM.getText(endNode).length ;
+ }
+ else if (!hasWrapperAncestor(startNode) && hasWrapperAncestor(endNode)){
+ var r3 = document.createRange() ;
+ r3.setEnd(innerEndNode, endOffset) ;
+
+ var csEndAncestor = getWrapperAncestor(endNode) ;
+ var prev = csEndAncestor ;
+ r3.setStartBefore(prev) ;
+
+ var ind = parseInt(csEndAncestor.id.substring('sv_'.length)) ;
+ while(r3.toString().length < range.toString().length) {
+ ind-- ;
+ var node = CY.get("#sv_"+ind) ;
+ if (node) {
+ prev = CY.Node.getDOMNode(node) ;
+ r3.setStartBefore(prev) ;
+ }
+ else
+ break ;
+ }
+ startNode = prev.firstChild ;
+ startOffset = 0 ;
+ }
+ else if (!hasWrapperAncestor(startNode) && !hasWrapperAncestor(endNode)){
+ var textLength = text.length ;
+
+ // gather nodes with id sv_xxxx as candidates for start ancestor
+ var startNodeInds = [] ;
+ for (var ind = 0 ; ; ind++) {
+ var svNode = CY.get("#sv_"+ind) ;
+ if (svNode == null) {
+ break;
+ }
+ else {
+ var svText = svNode.get("text") ;
+ if (text.indexOf(svText) == 0) {
+ startNodeInds.push(ind) ;
+ }
+ }
+ }
+
+ // gather nodes with id sv_xxxx as candidates for end ancestor
+ var endNodeInds = [] ;
+ for (var ind = 0 ; ; ind++) {
+ var svNode = CY.get("#sv_"+ind) ;
+ if (svNode == null) {
+ break;
+ }
+ else {
+ var svText = svNode.get("text") ;
+ if (text.indexOf(svText) == (textLength - svText.length)) { // i.e. the selection exactly ends with svText
+ endNodeInds.push(ind) ;
+ }
+ }
+ }
+
+ var stop = false ;
+ for (var i = 0 ; i < startNodeInds.length ; i++) {
+ for (var j = 0 ; j < endNodeInds.length ; j++) {
+ var r4 = document.createRange() ;
+
+ var s = CY.Node.getDOMNode(CY.get("#sv_"+startNodeInds[i])) ; var e = CY.Node.getDOMNode(CY.get("#sv_"+endNodeInds[j])) ;
+
+ r4.setStartBefore(s) ; r4.setEndAfter(CY.Node.getDOMNode(e)) ;
+
+ // does r4 starts after range start and r4 ends before range end ?
+ if ((-1 < r4.compareBoundaryPoints(0, range)) && (1 > r4.compareBoundaryPoints(2, range))) {
+ startNode = s.firstChild ;
+ startOffset = 0 ;
+ endNode = e.lastChild ;
+ endOffset = CY.DOM.getText(e).length ;
+
+ stop = true ;
+ break ;
+ }
+ }
+ if (stop)
+ break ;
+ }
+ }
+
+ r1.detach() ;
+ r2.detach() ;
+ }
+ else
+ return null ;
+ }
+ else
+ return null ;
+
+ }
+ else if (document.selection) { // IE case
+ var rng = document.selection.createRange();
+ if (rng.text.length == 0)
+ return null ;
+ var el = rng.parentElement();
+
+ // duplicate the range and collapse it to its start, to ask IE the parent element of the start textNode.
+ var rngStart = rng.duplicate();
+ var rngEnd = rng.duplicate();
+
+ rngStart.collapse(true); // collapse to start
+ rngEnd.collapse(false); // collapse to end
+
+ startNode = rngStart.parentElement() ;
+ while(rngStart.moveStart('character', -1) != 0) {
+ if (rngStart.parentElement() != startNode)
+ break ;
+ startOffset++ ;
+ }
+ endNode = rngEnd.parentElement() ;
+ while(rngEnd.moveEnd('character', -1) != 0) {
+ if (rngEnd.parentElement() != endNode)
+ break ;
+ endOffset++ ;
+ }
+
+ text = rng.text ;
+ }
+
+ if (!hasWrapperAncestor(startNode) || !hasWrapperAncestor(endNode)){
+ // CY.log('no wrapper on one end') ;
+ return null ;
+ }
+ return {'text' : text, 'start' : {'elt':startNode, 'offset':startOffset}, 'end' : {'elt':endNode, 'offset':endOffset}} ;
+}
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